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Search results for: Recombinant Human DEFB2 Proteins

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#23742088   // To Up

Production of small antibacterial peptides using silkworm-baculovirus protein expression system.

The recombinant proteins with strong antimicrobial activity are known to be very difficult to express using bacterial expression system. Here, human β-defensin (DEFB) 1, DEFB2, and DEFB3 were successfully produced using a silkworm-baculovirus protein expression system. We have generated four baculoviruses for each DEFB protein to compare the effect of different peptide tags in secretion into silkworm larval hemolymph. Interestingly, the best performing peptide tags for the secretion were different among DEFBs: C-terminal GST-H8 tag for DEFB1, N-terminal H8 tag for DEFB2, and C-terminal H8 tag for DEFB3, respectively. In addition, the colony count assay demonstrated that the recombinant DEFB2 s showed antimicrobial activities against Escherichia coli, Pseudomonas aeruginosa, and Paenibacillus thiaminolyticus.
Mai Fukushima, Kazuhiro Iiyama, Jun Yamashita, Masutaka Furue, Gaku Tsuji, Shigeo Imanishi, Hiroaki Mon, Jae Man Lee, Takahiro Kusakabe

2307 related Products with: Production of small antibacterial peptides using silkworm-baculovirus protein expression system.

2x 100ug5 reactions1 kit1 kit24 reactions 1 set1mg100ul100ug Lyophilized

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#20195655   2010/03/02 To Up

Recombinant mouse beta-defensin 2 inhibits infection by influenza A virus by blocking its entry.

Human influenza A virus (IAV) is a major cause of life-threatening respiratory tract disease worldwide. Defensins are small cationic peptides of about 2-6 kDa that are known for their broad-spectrum antimicrobial activity. Here, we focused on the anti-influenza A activity of mouse beta-defensin 2 (mBD2). The prokaryotic expression plasmid pET32a-mBD2 was constructed and introduced into Escherichia coli Rosseta gami (2) to produce recombinant mBD2 (rmBD2). Purified rmBD2 showed strong antiviral activity against IAV in vitro. The protective rate for Madin-Darby canine kidney cells was 93.86% at an rmBD2 concentration of 100 microg/ml. Further studies demonstrated that rmBD2 prevents IAV infection by inhibiting viral entry. In addition, both pretreatment and postinfection treatment with rmBD2 provided protection against lethal virus challenge with IAV in experimental mice, with protection rates of 70 and 30%, respectively. These results suggest that the mBD2 might have important effects on influenza A virus invasion.
Tianxiang Gong, Yan Jiang, Yueling Wang, De Yang, Wanyi Li, Qiang Zhang, Wei Feng, Baoning Wang, Zhonghua Jiang, Mingyuan Li

1774 related Products with: Recombinant mouse beta-defensin 2 inhibits infection by influenza A virus by blocking its entry.

1100 1 mg1 mg10 1 mg1 mg100ug Lyophilized200 100 1 mg100ug Lyophilized

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#17441334   // To Up

[Steady expression and activity determination of recombinant signal peptide of mBD2 in SiHa cell].

To observe the expression pattern and effect of recombinant murine beta defensin 2 (rmBD2) on the proliferation of cell transfected with pcDNA3. 1 (+)/rmBD2.
Xiao-Li Wei, Ming-Yuan Li, Hong Li, Qiao-Fa Shi, Wan-Yi Li, Zhong-Hua Jiang

2170 related Products with: [Steady expression and activity determination of recombinant signal peptide of mBD2 in SiHa cell].

1 kit2 Pieces/Box1 mg400Tests48 assays1 kit5 mg1 mg

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#11259252   // To Up

Organization of the human gene encoding the epididymis-specific EP2 protein variants and its relationship to defensin genes.

The EP2 gene codes for at least nine message variants that are all specifically expressed in the epididymis. These variants putatively encode small secretory proteins that differ in their N- and C-termini, resulting in proteins that can have little or no sequence similarity to each other. We have isolated and sequenced the human EP2 gene to determine the molecular origin of these variants. The EP2 gene has two promoters, eight exons, and seven introns. Exons 3 and 6 encode protein sequences homologous to beta-defensins, a family of antimicrobial peptides. This sequence homology and the arrangement of promoters and defensin-encoding exons suggest that the EP2 gene originated from two ancestral beta-defensin genes arranged in tandem, each contributing a promoter and two exons encoding a leader sequence and a defensin peptide. The proposed evolutionary relationship between the EP2 gene and defensin genes is supported by the observation that the EP2 gene is located on chromosome 8p23 near the defensin gene cluster and is separated by 100 kilobases or less from DEFB2, the gene for beta-defensin-2. While the EP2 gene transcribes beta-defensin-like message variants, most of the known message variants code for nondefensin proteins or proteins containing only a partial defensin peptide sequence. We suggest that, during its evolution, the EP2 gene has acquired new functions that may be important for sperm maturation and/or storage in the epididymis.
O Fröhlich, C Po, L G Young

2070 related Products with: Organization of the human gene encoding the epididymis-specific EP2 protein variants and its relationship to defensin genes.

1mg102100ug Lyophilized201 kit(96 Wells)0.1 mg100 U1mg100ug Lyophilized

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